Bitmap border

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Lasse

Trainee

Posts: 55

Wednesday, May 14th 2008, 7:47am

Bitmap border

I have made a simple speedometer. I render the needle and use a bitmap to view the meter. It looks very good, but the bitmaps border to the left is slightly visible. Is there a way to smooth out or hide the border?

ramandeep

Trainee

Posts: 107

Location: India

Occupation: embedded software

Wednesday, May 14th 2008, 12:16pm

RE: Bitmap border

I dont quite understand ur question....can u elaborate a bit?

Lasse

Trainee

Posts: 55

Wednesday, May 14th 2008, 1:48pm

Well I'll try. The meter bitmap has a black background (The meter itself is yellow) and its shape is 64X64. If the widget the bitmap is placed upon is white the bitmaps border will be very visible. No I have a black background widget and the left border of the bitmap is slightly visible.

I simply want the bitmap to blend in with the black background widget.

Lasse

Trainee

Posts: 55

Wednesday, May 14th 2008, 6:46pm

I'll post a picture of my problem. Please take a look at it...

Lasse has attached the following file:

Screenshot-SpeedoMeter.png (4.51 kB - 53 times downloaded - Last download: Oct 22nd 2008, 5:22am)

Nicolas SOUCHON

Professional

Posts: 1,106

Wednesday, May 14th 2008, 6:57pm

could you post your bitmap and the code to put it in a widget

Nicolas

Lasse

Trainee

Posts: 55

Wednesday, May 14th 2008, 7:37pm

The speedoMeter inherits QWidget and is simply put on a black QWidget window.

This is the code for the bitmap part...

Source code

void SpeedoMeter::paintEvent(QPaintEvent *event)
      {
        
          QPixmap pixmap("speedo.bmp");

          QPainter painter(this);
   
          painter.setRenderHint(QPainter::Antialiasing, true);
      
          painter.drawPixmap(10, 10, pixmap);

          .
          .
          .
 
      }

Nicolas SOUCHON

Professional

Posts: 1,106

Thursday, May 15th 2008, 8:47am

the bitmap too, please

Nicolas